December 1, 2018 at 2:36 pmThis is my 3rd month charting and 4 month ttc. My luteal was only 7 days the 1st month and 9 days last month. I took a pregnancy test today and it was negative. Im wondering what dpo is is appropriate to test? I thought I would have gotten AF by now! Also, what could be causing my luteal phase to vary in length? Thanks for any insight!